1242425447 has 4 divisors (see below), whose sum is σ = 1307816280. Its totient is φ = 1177034616.

The previous prime is 1242425411. The next prime is 1242425497. The reversal of 1242425447 is 7445242421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242425447 - 2⁶ = 1242425383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242425497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32695388 + ... + 32695425.

It is an arithmetic number, because the mean of its divisors is an integer number (326954070).

Almost surely, 2^1242425447 is an apocalyptic number.

1242425447 is a deficient number, since it is larger than the sum of its proper divisors (65390833).

1242425447 is an equidigital number, since it uses as much as digits as its factorization.

1242425447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65390832.

The product of its digits is 71680, while the sum is 35.

The square root of 1242425447 is about 35248.0559322071. The cubic root of 1242425447 is about 1075.0370845689.

Adding to 1242425447 its reverse (7445242421), we get a palindrome (8687667868).

The spelling of 1242425447 in words is "one billion, two hundred forty-two million, four hundred twenty-five thousand, four hundred forty-seven".